These coloring pages, which are essentially the same as digis, are from two stamp illustrators. They've actually sold some of these images as stamps to The Greeting Farm and Stampavie, so if you go to these pages, you can get the images for free! Make sure you read the Terms of Use.
Sarah Kay (Illustrator at Stampavie) coloring pages: http://coloringpages.nick-magic.com/sarahkay.html
Elizabeth O. Dulemba (Illustrator at The Greeting Farm) coloring pages: http://dulemba.com/index_ColoringPages.html#General